摘要
为确定种植密度对中麦30生长发育的影响,在大田条件下设置了3个种植密度:450,600和750万株·hm-2,研究种植密度对中麦30总茎数动态、干物质和氮素的积累与转运、籽粒产量和蛋白质质量分数等的影响。结果表明,种植密度可显著影响籽粒产量与单位面积穗数,600万株·hm-2种植密度的籽粒产量、单位面积穗数和分蘖成穗率均显著高于其他2个种植密度,但不同种植密度的穗粒数和千粒质量无显著变化,说明种植密度主要通过影响单位面积穗数而影响籽粒产量。3个种植密度下,中麦30成熟期群体干物质量随种植密度的增大而增加;而氮素积累量、氮素转运量和对籽粒氮素积累贡献率及籽粒蛋白质量分数以600万株·hm^(-2)种植密度的最大。3个种植密度相比较,中麦30在冀东地区的最适种植密度为600万株·hm^(-2),在该密度下通过增加单位面积穗数能实现高产目标,并通过促进氮素的积累和转运实现籽粒蛋白质质量分数较高的优质目标。
The effect of different planting densities on the dynamics of population size,dry matter accumulation,nitrogen(N)accumulation transport,grain yield and protein content of Zhongmai 30 was studied with three planting densities:4.5,6 and 7.5 million plants/hm^(2) under field conditions.The results showed that planting density significantly affected grain yield and spike number of Zhongmai 30.The grain yield,spike number per hectare and percentage of earring-tillers of the 6 million plants/hm^(2) treatment were higher than those of the others.But kernels per spike and 1000-grain weight showed little difference,indicating that the grain yield was affected by planting density mainly through affecting kernels per spike.Dry matter accumulation amount of Zhongmai 30 improved with the increase of planting density in mature stage,while the nitrogen accumulation,nitrogen transport,contribution rate to grain nitrogen accumulation,and grain protein content were the highest with the planting density of 6 million plants/hm^(2) treatment,the best planting density in Eastern Hebei Plain,under which high yield would be achieved through increasing spike number,and high protein content would be reached through promoting N accumulation and transport.
作者
史金平
张敏
杨敏
刘岩
蔡瑞国
SHI Jinping;ZHANG Min;YANG Min;LIU Yan;CAI Ruiguo(College of Agronomy and Biotechnology,Hebei Key Laboratory of Crop Stress Biology,Hebei Normal University of Science&Technology,Qinhuangdao Hebei,066004,China)
出处
《河北科技师范学院学报》
CAS
2023年第2期7-11,79,共6页
Journal of Hebei Normal University of Science & Technology
基金
“十三五”国家重点研发计划项目(项目编号:2016YED0300402)
秦皇岛市科学技术研究和发展计划项目(项目编号:202002B007)
河北省自然科学基金项目(项目编号:C2022407015)。
